Numerical analysis of the physical fields in the process of electrode blanks graphitization in the castner furnace
DOI:
https://doi.org/10.15587/1729-4061.2016.83191Keywords:
graphitization, electrode blanks, gasification, thermoelectric power state, direct heating furnaceAbstract
In the study, a numerical model is developed on the basis of the suggested physical and mathematical models to research the thermoelectric power state of the Castner furnace in the process of graphitizing electrode blanks. A distinctive feature of this study is an opportunity to take into account the impact of factors such as thermal effects of the chemical reactions of gasification, evaporation, condensation, sublimation of graphite, and thermoelectric power contact interaction between the elements of the furnace design. The verification of the numerical model of graphitizing electrode blanks has showed that the relative deviation between the calculated values of the average temperature of the candle blank after the start of the carbonaceous material gasification process is about 4 % in the temperature range of 600-1,600 °C in comparison with the physical experiment. The analysis of the numerical simulation results has revealed overstated average temperature values of candle blanks in the case of excluding the impact of thermal effects of chemical gasification reactions, heat and mass transfer of moisture, and conversion of the carbon monoxide and the hydrogen in the insulating charge of the furnace. Under the circumstances, the relative deviation in the average temperature of the candle workpieces in the examined points exceeds 10 % in comparison with the experimental data.
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Copyright (c) 2016 Anton Karvatskii, Serhii Leleka, Anatoliy Pedchenko, Taras Lazariev
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